/*
 * Copyright (C) 2011 Nicola Bonzanni
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package nl.vu.few.ibivu.jlemon;

import java.io.Serializable;
import java.util.AbstractSet;
import java.util.Iterator;
import nl.vu.few.ibivu.jlemon.concepts.Graph;
import nl.vu.few.ibivu.jlemon.concepts.Arc;

public class AsArcSet<A extends Arc & Comparable<A>> extends AbstractSet<A> implements Serializable {

	private static final long serialVersionUID = 1L;
	Graph<?,A> graph;
	
	public AsArcSet(Graph<?,A> graph) {
		this.graph = graph;
	}
	
	@Override
	public boolean contains(Object arc) {
		if (graph.getArcClass().isInstance(arc)) {
			return graph.id(graph.getArcClass().cast(arc)) != -1;
		}
		return false;
	}

	@Override
	public Iterator<A> iterator() {
		return new ArcIterator<A>(graph);
	}

	@Override
	public int size() {
		return graph.arcNum();
	}
}
